Afon Dyfrdwy (River Dee) SSSI

Afon Dyfrdwy (River Dee) is a Site of Special Scientific Interest (SSSI) in the preserved county of Clwyd, north Wales, along the River Dee with the River Dee (England) SSSI in England. The river begins in Snowdonia National Park, Wales. From there, it flows northeast to Corwen, goes eastwards past Llangollen, and continues east through Chester, England.[1] It empties into the Dee estuary, that forms the border between the Wirral Peninsula in north-west England and Flintshire in north-east Wales. The river has been designated a Designated Special Area of Conservation due to its role as a habitat for Atlantic Salmon and Floating Water Plantain.[2]

River Dee
River Dee at Llangollen
Native name	Afon Dyfrdwy
Location
Country	Wales, England
Cities	Llangollen, Chester
Physical characteristics
Source
• location	slopes of Dduallt above Llanuwchllyn in the mountains of Snowdonia
• coordinates	52°49′56″N 3°45′56″W
• elevation	450 m (1,480 ft)
Mouth	Dee Estuary
• coordinates	53°21′14″N 3°13′33″W
• elevation	0 m (0 ft)
Length	110 km (68 mi)
Basin size	1,816.8 km2 (701.5 sq mi)
Discharge
• location	Chester Weir
• average	29.71 m3/s (1,049 cu ft/s)
Discharge
• location	Manley Hall
• average	31.03 m3/s (1,096 cu ft/s)
Discharge
• location	Bala Lake
• average	13.06 m3/s (461 cu ft/s)
Basin features
Tributaries
• left	Tryweryn, Alwen, Clywedog, Alyn
• right	Ceiriog, Wych Brook